Improvement in pipe-molds



EDWARD WALSH. Improvement in Pipe-Molds.

Patented April 30,1872.

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UNITED STATES EDWARD WALSH, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN PlPE-MOLDS.

Specification forming part of Letters Patent No. 126,354, dated April30, 1872.

Specification describing a certain Improvement in Pipe-Molds, inventedby EDWARD WALSH, of the city of Rochester, in the county of Monroe andState of New York.

This mold is designed for making sewer and drain pipe; and the inventionconsists in the devices for finishing the coupling-heads of the pipe,for clamping the halves of the mold together, and for draining off thesurplus water at the bottom, as hereinafter described.

In the drawing, Figure 1 is a perspective view of my improved mold; Fig.2, a vertical section of the same; Fig. 8, a plan of one of the clamps;Fig. 4, a bottom view of the finishing head or block.

A A are the two halves or sections of the mold, provided with theordinary enlarged head B for forming the coupling-heads of the pipes.These halves are coupled together by means of concentric clamps O G,pivoted at a a to one-half, and connected, by means of wedging anddovetailed keys I) b passing through corresponding holes 0 c of the endsof the clamps and lugs d d, to the other half. By this means the clampsmay be swung around out of the way in uncoupling the parts to remove thecast; and in coupling they fit closely to the sides of the molds andproduce an extended bearing, which always keeps the parts in place underall circumstances, and they can be drawn up as closely as possible. Theyare used on opposite sides, both at the top and bottom, as shown. Theyalso furnish holds by which to lift the mold. This arrangement forms onefeature of my invention. Inside the mold, and attached fast to the fixedbase D, is the ordinary core E, which extends nearly to the top of themold, leaving space between itself and the side of the molds to form thecast. The base is provided with a series of raised ribs, ff, on whichrests a collar-block, G, that forms the base for the bottom of the moldto rest on. This block slides loosely over the core, to which it fitsclosely, and has a series of water-ways, g g, leading from the centeroutward (preferably inclined) from the level on which the bottom of themold rests. The intermediate elevations h h simply inolose the socket inwhich the mold rests, and thus keeps the latter in place. The

object of this collar-block is to allow the surplus water to escapethrough the channels 9 9, thereby leaving the lower end of the cast drywhen removed from place, and preventing the roughness and breakage ofthe edge that invariablyoccursin commonmolds. Italsot'urnishes the holdby which the mold is lifted from the core when the castis formed. Theuse of this block resting upon the ribs f f enables the cast to bestarted easily from the core by simply placing a lever in the spacebetween the collar-block and base and raising upward, after which thewhole is easily raised by hand. This block also forms one feature of myinvention. On top the mold a finishing block, P, is employed, whichconsists of a disk with an outer seat, k, which rests on the top edge ofthe mold. Inside this is atinishing-face, m,whose width is the same asthe upper edge of the cast to be formed. This face is perfectly smoothand flat. Within this is a depending collar,

p, which forms the core to the enlargement ot the mold or head of themold, and which has a central socket, f, in which fits the upper end ofthe main core. On top the finishing-block is mounted a cross-handle orlever, It, resting.

in bearings 1' 1'. When the mold has been filled with clay thefinishing-block is applied on top and pressed into its seat. This actioncompresses the material closely in the mold. The cross-handle is thenseized in the hands of the operator and turned one way and the other. Bythis action the finishing-face m is swept over the upper end of thecast, which is thereby made square and smooth and finished up to formthe coupling. This finishingblock is of much importance, as it enablesme to produce the head of the pipe in a finished and much better formthan it has heretofore been done, and without the use of a trowel.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. In a pipe-mold, I claim the finishing-block P provided with the seat7.", finishing-face m, depending collar 1), and socket s, in combination with the molds A A and the core E, all constructed and operatingsubstantially as set forth.

2. In a pipe-mold, I claim the loose collarblock G provided with thewater-ways g g,

when combined with the mold A A and ribbed my name in the presence oftwo subscribing brace D, as herein described. witnesses.

3. In a pipe -mold, I claim the concentric EDWARD WALSH. coupling clamps(J C, combined with the halves A A of the mold, and secured by thedovetailed Witnesses: keys b b, as herein described. R. F. OSGOOD,

In witness whereof I have hereunto signed ARCHIE BAINE.

